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Distinct magnetic contributions for magnetoelectric coupling at room temperature in perovskite PZT-PFN solid solutions

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Autor(es):
Zabotto, Fabio L. ; Barbosa, Vitor F. ; Pereira, Carolyne C. S. ; Estrada, Flavia R. ; Lente, Manuel H. ; Chen, Xiang Ming ; Eiras, Jose A.
Número total de Autores: 7
Tipo de documento: Artigo Científico
Fonte: Journal of Alloys and Compounds; v. 929, p. 7-pg., 2022-12-25.
Resumo

Although a high technological interest, there are only a few single-phase solid solutions that exhibit multiferroic and magnetoelectric coupling at room temperature. In this work, such characteristics are reported for PZT-xPFN solid solutions. It is noticed that magnetoelectric coupling and its nature are anomalously dependent on the PFN concentration, resulting from linear magnetoelectric and paramagnetoelectric contributions. The origin of the multiferroicity and the magnetoelectric coupling is explained by considering the presence and evolution of complex defects and magnetic nanoregions caused by PFN addition. For the lower PFN (x = 0.10), the magnetic order is related to Fe-Vo complex defects. For intermediary Fe-Nb concentration (0.15 < x < 0.25), the equimolar Fe-Nb and well-distributed Fe3+ ions result in a paramagnetic system, without linear magnetoelectric coupling. Finally, for higher Fe-Nb concentrations (0.30 < x < 0.35), the magnetic order is related to the existence of Fe-rich nanoregions, resulting in a linear magnetoelectric coupling three times smaller than that measured for lower PFN content.(c) 2022 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 19/16978-6 - Síntese e caracterização de propriedades físicas de cerâmicas multiferróicas monofásicas de Pb(Fe,Nb)-Pb(Zr,Ti)O3
Beneficiário:Ana Carolyne da Silva Pereira
Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
Processo FAPESP: 19/03110-8 - Síntese e caracterização fotovoltaica de filmes finos à base de perovskitas ferroelétricas e multiferróicas para aplicação em células solares
Beneficiário:Mahmoud Saleh Mohammed Alkathy
Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 17/13769-1 - Materiais multiferróicos e ferroelétricos para conversores de energia: síntese, propriedades, fenomenologia e aplicações
Beneficiário:José Antonio Eiras
Modalidade de apoio: Auxílio à Pesquisa - Temático